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Current-limited power-distribution switches

Inventory: 822

Quality information

RoHS Yes
Lead finish / Ball material NIPDAU
MSL rating / Peak reflow Level-1-260C-UNLIM
Material content View
DPPM / MTBF / Fit rate View
Qualification summary View
Ongoing reliability monitoring View
Device marking View

Packaging information

Package | Pins Package qty | Carrier Operating temperature range (°C)
SOIC (D) | 8 75 | TUBE
I (-40 to 85)
Package | Pins SOIC (D) | 8
Package qty | Carrier 75 | TUBE
Operating temperature range (°C) I (-40 to 85)
View TI packaging information

Features for the TPS2046B

  • 70-m High-SideMOSFET
  • 250-mA Continuous Current
  • Thermal and Short-Circuit Protection
  • Accurate Current Limit (0.3 A min, 0.7 A max)
  • Operating Range: 2.7 V to 5.5 V
  • 0.6-ms Typical Rise Time
  • Undervoltage Lockout
  • Deglitched Fault Report (OC)
  • No OC Glitch During Power Up
  • Maximum Standby Supply Current: 1-µA (Single and Dual) or 2-µA (Triple)
  • Bidirectional Switch
  • Ambient Temperature Range: -40°C to 85°C
  • ESD Protection
  • UL Pending
    • Heavy Capacitive Loads
    • Short-Circuit Protections

Description for the TPS2046B

The TPS204xB/TPS2055B power-distribution switches are intended for applications where heavy capacitive loads and short circuits are likely to be encountered. These devices incorporate 70-m N-channel MOSFET power switches for power-distribution systems that require multiple power switches in a single package. Each switch is controlled by a logic-enable input. Gate drive is provided by an internal charge pump designed to control the power-switch rise times and fall times to minimize current surges during switching. The charge pump requires no external components and allows operation from supplies as low as 2.7 V.

When the output load exceeds the current-limit threshold or a short is present, the device limits the output current to a safe level by switching into a constant-current mode, pulling the overcurrent (OCx) logic output low. When continuous heavy overloads and short-circuits increase the power dissipation in the switch, causing the junction temperature to rise, a thermal protection circuit shuts off the switch to prevent damage. Recovery from a thermal shutdown is automatic once the device has cooled sufficiently. Internal circuitry ensures that the switch remains off until valid input voltage is present. This power-distribution switch is designed to set current limit at 0.5 A typically.


Qty Price (USD)
1-99 $1.655
100-249 $1.367
250-999 $0.982
1,000+ $0.739

Additional package qty | carrier options

Package qty | Carrier 2,500 | LARGE T&R
Inventory 43,368
Qty | Price (USD) 1ku | $0.616 1-99 $1.380 100-249 $1.140 250-999 $0.819 1,000+ $0.616
Custom reel may be available